With patch 235.3 the developers have added a third-party anticheat called Battleye. This anti-cheat blocks the trainer from accessing the game which results in an access-denied error message.

The updated trainer has a workaround by launching the game directly without battleye. This will of course not let you play multiplayer and is only for singleplayer usage with the trainer. It works as long as the developers are not forcing you to launch the game with battleye only. If they do, which is up to them, I have to retire the game as I'm not trying to defeat an anticheat which is designed to prevent multiplayer cheating (as this is something I'm definitely support).

The updated trainer will be posted soon. //edit: Please read updates notes on how to use the trainer!

Hi. First time I've ever had a trainer from CH fail on launch.Win 8.1 x64, .net framework 4.6.1ARK SE 232.4Trainer starts as usual but immediately fails with an invalid class error.Game not running, no a/v, no firewall, trainer running as admininstrator.